java前端界面展示一周时间段选择

好的，下面是一个简单的 Java 前端界面展示一周时间段选择的示例代码：

import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingConstants;

public class WeekdayPicker extends JFrame implements ActionListener {
    private static final long serialVersionUID = 1L;
    private static final String[] WEEKDAYS = { "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat" };
    private static final String[] MONTHS = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" };
    private JButton[] dayButtons;
    private JLabel monthLabel;
    private JLabel yearLabel;
    private Calendar currentCalendar;

    public WeekdayPicker() {
        super("WeekdayPicker");
        currentCalendar = Calendar.getInstance();
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(new Dimension(400, 300));
        setLocationRelativeTo(null);
        setResizable(false);
        setLayout(new BorderLayout());
        initUI();
        setVisible(true);
    }

    private void initUI() {
        JPanel topPanel = new JPanel(new FlowLayout(FlowLayout.CENTER));
        JButton prevYearButton = new JButton("<<");
        prevYearButton.setActionCommand("prevYear");
        prevYearButton.addActionListener(this);
        topPanel.add(prevYearButton);

        JButton prevMonthButton = new JButton("<");
        prevMonthButton.setActionCommand("prevMonth");
        prevMonthButton.addActionListener(this);
        topPanel.add(prevMonthButton);

        monthLabel = new JLabel(getMonthString(currentCalendar.get(Calendar.MONTH)), SwingConstants.CENTER);
        monthLabel.setFont(new Font("Arial", Font.BOLD, 18));
        monthLabel.setPreferredSize(new Dimension(120, 30));
        topPanel.add(monthLabel);

        yearLabel = new JLabel(String.valueOf(currentCalendar.get(Calendar.YEAR)), SwingConstants.CENTER);
        yearLabel.setFont(new Font("Arial", Font.BOLD, 18));
        yearLabel.setPreferredSize(new Dimension(60, 30));
        topPanel.add(yearLabel);

        JButton nextMonthButton = new JButton(">");
        nextMonthButton.setActionCommand("nextMonth");
        nextMonthButton.addActionListener(this);
        topPanel.add(nextMonthButton);

        JButton nextYearButton = new JButton(">>");
        nextYearButton.setActionCommand("nextYear");
        nextYearButton.addActionListener(this);
        topPanel.add(nextYearButton);

        add(topPanel, BorderLayout.NORTH);

        JPanel centerPanel = new JPanel(new GridLayout(7, 7));
        dayButtons = new JButton[49];
        for (int i = 0; i < 7; i++) {
            centerPanel.add(new JLabel(WEEKDAYS[i], SwingConstants.CENTER));
        }
        for (int i = 0; i < 49; i++) {
            JButton button = new JButton();
            button.setPreferredSize(new Dimension(50, 50));
            button.setBorder(BorderFactory.createEmptyBorder());
            button.setFocusPainted(false);
            button.addActionListener(this);
            dayButtons[i] = button;
            centerPanel.add(button);
        }
        updateDayButtons();
        add(centerPanel, BorderLayout.CENTER);

        JPanel bottomPanel = new JPanel(new FlowLayout(FlowLayout.RIGHT));
        JButton cancelButton = new JButton("Cancel");
        cancelButton.addActionListener(this);
        bottomPanel.add(cancelButton);

        JButton okButton = new JButton("OK");
        okButton.addActionListener(this);
        bottomPanel.add(okButton);

        add(bottomPanel, BorderLayout.SOUTH);
    }

    private void updateDayButtons() {
        int year = currentCalendar.get(Calendar.YEAR);
        int month = currentCalendar.get(Calendar.MONTH);
        int dayOfWeek = currentCalendar.get(Calendar.DAY_OF_WEEK);
        int firstDayOfWeek = currentCalendar.getFirstDayOfWeek();
        currentCalendar.set(Calendar.DAY_OF_MONTH, 1);
        int daysInMonth = currentCalendar.getActualMaximum(Calendar.DAY_OF_MONTH);
        int day = 1;
        int i = 0;
        for (; i < dayOfWeek - firstDayOfWeek; i++) {
            dayButtons[i].setText("");
            dayButtons[i].setEnabled(false);
            dayButtons[i].setBackground(new Color(240, 240, 240));
        }
        for (; i < dayOfWeek - firstDayOfWeek + daysInMonth; i++) {
            dayButtons[i].setText(String.valueOf(day));
            dayButtons[i].setEnabled(true);
            dayButtons[i].setBackground(new Color(255, 255, 255));
            day++;
        }
        for (; i < dayButtons.length; i++) {
            dayButtons[i].setText("");
            dayButtons[i].setEnabled(false);
            dayButtons[i].setBackground(new Color(240, 240, 240));
        }
        monthLabel.setText(getMonthString(month));
        yearLabel.setText(String.valueOf(year));
    }

    private String getMonthString(int month) {
        return MONTHS[month];
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        String command = e.getActionCommand();
        switch (command) {
        case "prevYear":
            currentCalendar.add(Calendar.YEAR, -1);
            break;
        case "prevMonth":
            currentCalendar.add(Calendar.MONTH, -1);
            break;
        case "nextMonth":
            currentCalendar.add(Calendar.MONTH, 1);
            break;
        case "nextYear":
            currentCalendar.add(Calendar.YEAR, 1);
            break;
        case "Cancel":
            dispose();
            break;
        case "OK":
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
            StringBuilder builder = new StringBuilder();
            builder.append(sdf.format(currentCalendar.getTime())).append(" - ");
            currentCalendar.add(Calendar.DAY_OF_MONTH, 6);
            builder.append(sdf.format(currentCalendar.getTime()));
            System.out.println(builder.toString());
            dispose();
            break;
        default:
            break;
        }
        updateDayButtons();
    }

    public static void main(String[] args) {
        new WeekdayPicker();
    }
}

该示例代码实现了一个简单的一周时间段选择的功能，具体如下：

1. 界面由上、中、下三个部分组成，分别是顶部的年月选择、中间的日期选择和底部的取消和确定按钮。
2. 日期选择部分使用 GridLayout 布局方式，排列为 7 行 7 列的网格，第一行为星期几，其余行为日期。使用 JButton 实现每个日期的按钮。
3. 使用 Calendar 类获取当前年月和计算每个月的日期，并且根据日期的星期几确定在网格中的位置，更新每个日期按钮的显示文本、是否可用和背景色。
4. 点击年月选择按钮或日期按钮，更新当前年月或者选择日期，并且更新日期选择部分的显示。
5. 点击确定按钮，将选择的时间段输出到控制台，并且关闭界面。

希望这个示例代码能够对您有所帮助。